Connecting device for use with stranded metal cables



Sept. .22, 1931. J. w. ASTLEY CUNNECTING DEVICE FOR USE WITH STRANDED METAL CABLES Filed April 2, 1930 2 Sheets-Sheet 1 h A A N an:

.Sept. 22, 1 931. .1. w. ASTLEY CONNECTING DEVICE FOR USE WITH STRANDED METAL CABLES 2 Sheets-Sheet 2 Filed April 2, 1930 a ME Patented Sept. 22, 1931 r oFricE are JOHN WILLIAM AS'ILEY, or rnnscor, ENGLAND, ,assrenon T0 nnrrrsn INSULATED cnBLns LIMITED, or rensocr, a Bn-rrIsr-r COMPANY CONNECTILIG- DEVICE F R USE VJITH STBANDED METAL CABLES.

Application filed April 2, 1930, Serial No. 440,933, and n Great Britain May 22, 1929.

This invention relates to devices for congroups are 01": different metals (for instance, steel centre group and an alumlnium outer group) it is desirable'that the method of connection should provide a certain amount of independence between the connections of the two groups. The present invention provides in a simple and compact form this independence, making use of known means for gripping the ends of the wires or groups of wires by conical wedgingactions resulting from the relative displacement of inner and outer cones. Instead of using the device for connecting together the ends of two lengths of cable, it may also be employed where it is required to connect a length of cable to a solid bar or eye or other body. In accordance with the invention wesup port the outer'lnember of the conical clamp for the inner group on the outer member of the conical clamp for the outer group in such a way as to permit independent movement of the inner members of the clamping devices, while providing for the connecting together of the two cable ends, or of a cable end to another body, by a single sleeve.

If two lengths of cable are to be connected 7 together we provide a flange or other lateral projection or projections on one of the outer conical members so arranged as to engage a seating or seatings on or in other outer conical members, so that when the clamping devices have been assembled, these two members are maintained in a definite relation to each other. The two inner conical, members are however not restrained from movement relative to each other by this mounting and are free to take up the position determined by the wedging action in each case. The two outer members for the respective cable ends are joined together by a sleeve which is preferably screw threaded in one end only and has collar in the other end en gaging behind a shoulder on the corresponding outer conical member. The sleeve and one outer conical member may be provided with the invention are illustrated by way of examples, in the accompanying drawings, wl1ere1n:

Fig. 1 shows a longitudinal section of a device for connecting together the ends of two lengths of cable,

Fig. 2 shows a longitudinal view partly in section of a device for connecting a length of cable to a solid bar provided with an eye,-

and

Fig. 3 is a plan view of Fig. 2. In Fig. 1, the ends 1 and 2 of the two lengths of cable are connected together by pairs of inner and outer cones and as the construction and arrangement of these are the same for the two ends, only one arrangement as employed for the end 1 need be described. The wires comprising the end 1 consist of an inner group of wires 3, which may be of steel, and an outer group of wires 4:, which may be of aluminium. The inner group of'wires 3 are gripped by means of an inner cone 5 and an outer cone 6, and the outer group of wires 4 are gripped by an inner cone 7 and an outer cone 8. The inner cone 5 is made in two halves to receive the central wireof the inner group of wires 3, and the other wires of this group are gripped between the outer cone 6 and the inner cone 5. The wires of the inner group pass with clearance through the inner cone 7 and the outer group of wires 4 are gripped between the inner cone 7 and the outer cone 8. The inner cone 5 maybe a solid cone or it may havea bore to receive a number of the wires In the case where the central part of the cable consists-of a single wire, the inner cone 5 and the outer cone 6 will be made 'with flats to permit them to be engaged by of such dimensions that they fit together the outer and inner 'rou s of wires.

and the central wire will be gripped between the two halves oi": the cone 5 in the same way that the central wire of the inner group is gripped in the example illustrated.

Theiinner endv of the outer cone 8 has a flangea9 so that a recess is formed, one wall 10 of which serves as an abutment fer the outer cone 6 when the cones are erippin t l:

outer cone 8 isalso formed with a shoulder 14 forming an abutment for a PlOJQC'tlOIl 13 on one endof a'slee've 12. The latter is adapted toscrew on tea-threaded portion 11 on the outer cone 16 shown to the left 'offFig. 1.. After the cones have been assemhled,-.thesleeve.12 is screwed up gently but: firmly: in order to complete the oint:

The wires of the cable are gripped by:

the wedging action of the cooperating pairs of Inner and outer cones. The inner cones 7: are driven into the outer cones 8to grip theouter group of wires 4 and the inner cones 5 are driven into the outercones 6' to griptheinnenwires' 3, the wires of the outer: groupbeing cut off somewhat shorter" than those of the lnner group. In this con-'- structi'on, the outer cones- 6' are caused to take up a. definiteposition relatively to the outer cones 8,.although the inner. cones 5 and 7 :tions in each case.

introducing protective compound may" bev are not prohibited from movin elatively (7 u to each other but are free-to take uptheir position as determined by the wedging ac- A filling screw 17' for provided in the sleeve'12. The inner cones 5 will be arranged: generally so that they project inwardly-to a. certain extent beyond theouter cones 6, sothatthe tightening-up of the sleeve 12' tends to wedge the cones 5' still more firmly into the cones 6.

In Figs. 2 and 3',- the'end 1 m a cable-- s shown connected to a-solid bar 18-provided with an siilator on rangement cable is the eye 19 for attachment'to an ina: pole for example. The arfor clamping the end of the same as ust described an d. con- ,sists ot'an inner cone and an, outer. cone for the inner wires and inner and outer cones for, the outer group of wires.

behind a collar 20 on thebar 18 when the sleeve 12, is screwed up; The bar 18 mayhave an inwardly projecting; portion 21 which abuts against: the. inner end of the cone '5 when the sleeve12. is screwed up. The arrangement shown in these figures includes provision fortapping off a branch connec- The tate

The sleeve 12 has aprojection 13 which engages tion. Such provision forms no part of the present invention.

What I claim as my invention and desire to secure by Letters Patent is 1. A device for connecting an end of a length of cable, comprising an outer group of wires and a core consisting of an inner group of wires or a single central wire, to another member, said device comprising an inner-clamping cone for the core, an inner clamping cone for the outer group of wires, an out-er clamping cone, for the outer group of wires and having a Seating on it, a flanged. outer clamping cone for the core supported on the seating of the outer clampin cone for the outer group of wires, and a" single sleeve for connecting-said cable end to the other member.

2; A device for connecting together the .nds of two lengths of cable, each cable havin an outer group of wires and a core consis ingxof an inner group of wires or a single central wire, said device comprising an inner clamping cone for each core, an inner clamping cone for each of the outer groups of wires, an outer clamping cone for each outer group of wires and having a seating'onp it, a flanged outer clamping cone-tor each of the cores supported on the seatin of the appropriate outer clamplng cone Ior the outer group of wires, a single sleeve for engagement with each outer clamping cone for the outer groups of wires, and a loch-nut on one of said outer clampvcones for the outer group of wires.

0. A device for connecting an end of a lengthof cable, comprising an outer group of wires'and a core consisting of an innergroup of wires or-a single central wire, to another-member, said device comprising an innenclamping cone for the core, an outer clamping-cone for the core having a flange laterally extending from its end of greater diameter, an inner clamping cone for the outer group of wires, an outer clamping cone ior said group, said outer clamping cone having a conical extension, which surrounds the outer cone for the core and which has at its end of greater diameter a seating to receive the flange on that outer cone, and a sleeve engaging the-extension of the outer conical member for the outer group of wires and connecting said cable end to the other member.

in testimony whereof I aflix my signature;

JOHN WVILLIAM ASTLEY. 

